10I- (aq) + 2MnO4- (aq) + 16H+ (aq) rightarrow 5I2 (s) + 2Mn2+ (aq) + 8H2O (I) W

Question

10I- (aq) + 2MnO4- (aq) + 16H+ (aq) rightarrow 5I2 (s) + 2Mn2+ (aq) + 8H2O (I) What is the change in oxidation number of manganese? +5 -5 +3 -3 0 Which one of the following items does not characterize a reducing agent? A good reducing agent is a metal in a high oxidation state, such as Mn7+. A reducing agent causes another species to be reduced. The oxidation number of a reducing agent increases. The oxidation number of a reducing agent increases. A reducing agent losses electrons. An example of a good reducing agent is an alkali metal, such as Na. The standard reduction potentials have been determine using _____. A battery A zinc air battery A standard hydrogen electrode A silver/silver chloride electrode The work done on a circuit Electrolysis is defined as: The force pushing electrons through an electrical circuit System that converts chemical energy into electrical work A procedure to correct the calculation of cell potential for non-standard conditions Process in which electrical energy drives a non-spontaneous chemical reaction A concentration cell When the value of Delta Gcell > 0, then Ecell > 0 Ecell 0 and the reaction in the voltaic cell is spontaneous Compare the energy released by the collisions and annihilation of (1) an electron and a positron and (2) a proton and an antiproton. The energy released would be the same. The energy released in (2) would be much greater than that re eased m (1). The energy released in (1) would be much greater than that released m (2). Energy is consumed in these processes, not released. Energy is not released in these collisions.

Explanation / Answer

1) B

2) A

3) C

4) D

5) C

6) B

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